TonightWill the "hate-watching" subside in Season 2 of "Smash"? The much-maligned Broadway drama returns with some cast tweaks and other changes, including no more ridiculous scarves for Julia (Debra Messing). 9 p.m., NBC."Silicon Valley," the latest offering from the "American Experience" documentary series, is an absorbing examination of the rough-and-tumble early days of the high-tech industry and the ingenuity that went into changing the way the world works, plays and communicates. 9 p.m., PBS.WednesdayCrossover alert: "CSI: Crime Scene Investigation" and "CSI: NY" do some mingling as Mac Taylor (Gary Sinise) travels to Las Vegas to surprise his girlfriend, only to get a surprise himself: She's missing. 10 p.m., CBS.ThursdayIt's about time. After a long delay, the kooky campus comedy "Community" finally returns to kick off Season 4 with "Hunger Games"-style competition to determine who gets a spot in Greendale's coveted history class. 8 p.m., NBC.FridayThe two-hour Season 2 opener of "Touch" finds Martin (Kiefer Sutherland) and his gifted son, Jake (David Mazouz) frantically trying to help Lucy (Maria Bello) find her missing daughter before the baddies from Aster Corps do something evil. 8 p.m., Fox."The Job" may sound like "The Apprentice," but it's not. It's a new reality series that has candidates competing for positions with prominent companies and, hopefully, lowering the unemployment rate in the process. 8 p.m., CBS.Saturday"The Grammys Will Go On: A Death in the Family" is a one-hour documentary that takes viewers behind the scenes of last year's Grammy telecast and recounts the last-minute changes made to honor Whitney Houston, who died on the eve of the show. 9 p.m., CBS.

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